# apt-mark
# Utility to change the status of installed packages.
# More information: <https://manpages.debian.org/latest/apt/apt-mark.8.html>.
# Mark a package as automatically installed:
sudo apt-mark auto package_name
# Hold a package at its current version and prevent updates to it:
sudo apt-mark hold package_name
# Allow a package to be updated again:
sudo apt-mark unhold package_name
# Show manually installed packages:
apt-mark showmanual
# Show held packages that aren't being updated:
apt-mark showhold
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